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Across
  1. 3. Inclines on mountains or hills
  2. 5. Material moved by glaciers
  3. 7. Small, rounded hill
  4. 9. Ice-covered mountain summit
  5. 10. Tall pointed rock
  6. 12. Large curve in coastline
  7. 16. Natural or man-made passageway
  8. 18. Volcanic activity event
  9. 21. Low-lying wetland area
  10. 23. Wind-sculpted sandy hills
  11. 24. Water-formed small valley
  12. 26. Route through a mountain range
  13. 27. Narrow elevated landform
  14. 29. Fast-flowing water
  15. 30. Series of waterfalls
Down
  1. 1. Large floating ice sheet
  2. 2. Coastal land projecting into water
  3. 4. Elevated flat terrain
  4. 6. Area between tropics
  5. 8. River's winding curve
  6. 11. Region of fjords
  7. 13. Small lake in mountains
  8. 14. Landforms at river mouths
  9. 15. Glacially deposited debris
  10. 17. Large expanse of ice
  11. 19. Deep undersea depressions
  12. 20. U-shaped river lake
  13. 22. Sudden ground movement
  14. 25. Land along bodies of water
  15. 28. Highest points of mountains